Is its western extremity the thin end? (5)
I believe the answer is:
wedge
'thin end?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'is its western extremity' is the wordplay.
I cannot quite understand how this works, but
'western' could be 'w' and 'w' is located in the answer.
'extremity' could be 'edge' (edge is a kind of extremity) and 'edge' is present in the answer.
No letters remain.
This explanation may well be incorrect...
'the' is the link.
Can you help me to learn more?
(Other definitions for wedge that I've seen before include "Device eg to keep door open" , "It may cause division" , "Golf club, V-shape" , "Tapering object pushed into a gap - golf club" , "V-sign" .)